* WorkArea

- hasFocus(): new pure virtual method
  - redraw(): update singlePar only if the Widget has the focusInEvent

* GuiWorkArea.h: implement hasFocus().

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15724 a592a061-630c-0410-9148-cb99ea01b6c8

src/frontends/WorkArea.C

@@ -148,7 +148,7 @@ void WorkArea::redraw(bool singlePar)
 		return;
 	}
 
-	buffer_view_->updateMetrics(singlePar);
+	buffer_view_->updateMetrics(singlePar && hasFocus());
 
 	updateScrollbar();
 

src/frontends/WorkArea.h

@@ -65,6 +65,9 @@ public:
 	///
 	BufferView const & bufferView() const;
 
+	/// \return true if has the keyboard input focus.
+	virtual bool hasFocus() const = 0;
+	
 	/// return the width of the work area in pixels
 	virtual int width() const = 0;
 

src/frontends/qt4/GuiWorkArea.h

@@ -94,6 +94,9 @@ public:
 	///
 	GuiWorkArea(int width, int height, int id, LyXView & lyx_view);
 
+	///
+	bool hasFocus() const { return QAbstractScrollArea::hasFocus(); }
+
 	/// return the width of the content pane
 	virtual int width() const { return viewport()->width(); }
 	/// return the height of the content pane